Device for detecting stress acousto-elasticity coefficient of coating structure

Abstract

The invention discloses a device for detecting a stress acousto-elasticity coefficient of a coating structure. The device comprises a fixed frame and a moving frame, the top of the fixed frame is provided with a top plate, and the moving frame comprises a front side plate, a rear side plate, a cover plate and a bottom plate. The front side plate and the rear side plate are positioned on the frontside and the rear side of the fixed frame respectively, and bottom ends of the front side plate and the rear side plate of the moving frame are connected through the bottom plate while top ends are connected through the cover plate. The cover plate and the bottom plate of the moving frame are positioned above and below the top plate of the fixed frame respectively. An upper grip is arranged at thebottom of the top plate of the fixed frame, a lower grip is arranged at the top of the bottom plate of the moving frame, and a to-be-detected coating structure sample is clamped by upper and lower clamping claws of the upper and lower grips. Two universal clamping frames are arranged at the bottom of the upper grip, an ultrasonic probe is clamped at the bottom of each universal clamping frame, and the two universal clamping frames drive the two ultrasonic probes to be attached on front and rear sides of the to-be-detected coating structure sample to realize ultrasonic detection. The device has the advantage that the stress acousto-elasticity coefficient of the coating structure sample can be detected.

Description

technical field [0001] The invention relates to the field of mechanical detection, in particular to a device for detecting the stress acoustic elastic coefficient of a coating structure. Background technique [0002] Surface coating materials endow parts with the required properties such as high temperature resistance, wear resistance and fatigue resistance to improve the performance of base materials, improve the reliability of parts and repair damaged parts. However, during the manufacturing and forming process of coating materials, accompanied by high energy input, the microstructural properties of the material are often changed, resulting in the distribution of residual stress field, which is easy to form microcracks and microscopic defects. In order to ensure the safe operation of coated structural parts, it is necessary to perform ultrasonic testing on the internal residual stress of coated parts. Due to the internal stress of the coated structural parts, the propagat...

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Problems solved by technology

However, there is no good detection method for the residual stress of coated structural parts

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